We investigate whether a simple cosmology can fit GRB results in both time dilation and simultaneously. Simplifying assumptions include: all GRBs are spectrally identical to BATSE trigger 143, universe, and no luminosity and number density evolution. Observational data used include: the BATSE 3B peak brightness distribution (64-ms time scale), the Pioneer Venus Orbiter (PVO) brightness distribution, and the Norris et al. (8) time dilation results for peak aligned profiles presented at this meeting. We find acceptable cosmological fits to the brightness distributions when placing BATSE trigger 143 at a redshift of This translates into a factor of about between selected brightness extremes of the Norris et al. sample. Norris et al. (8,10,13) estimate, however, that when considering duration tests. The difference is marginal and could be accounted for by evolution. We therefore find that evolution of GRBs is preferred but not demanded.
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1 August 1996
Gamma-ray bursts: 3rd Huntsville symposium
25-27 Oct 1995
Huntsville, Alabama (USA)
Research Article|
August 01 1996
Time-dilation, and cosmology
R. J. Nemiroff;
R. J. Nemiroff
NASA/Goddard Space Flight Center, Greenbelt, Maryland 20771
George Mason University, Fairfax, Virginia 22030
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J. P. Norris;
J. P. Norris
NASA/Goddard Space Flight Center, Greenbelt, Maryland 20771
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J. T. Bonnell;
J. T. Bonnell
Universities Space Research Association
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J. D. Scargle
J. D. Scargle
NASA/Ames Research Center, Moffett Field, California 94035
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AIP Conf. Proc. 384, 507–511 (1996)
Citation
R. J. Nemiroff, J. P. Norris, J. T. Bonnell, J. D. Scargle; Time-dilation, and cosmology . AIP Conf. Proc. 1 August 1996; 384 (1): 507–511. https://doi.org/10.1063/1.51713
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